Streaming in MANET: Proactive Link Protection and Receiver-Oriented Adaptation

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2006-01-01
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Xu, Toby
Cai, Ying
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Computer Science

Computer Science—the theory, representation, processing, communication and use of information—is fundamentally transforming every aspect of human endeavor. The Department of Computer Science at Iowa State University advances computational and information sciences through; 1. educational and research programs within and beyond the university; 2. active engagement to help define national and international research, and 3. educational agendas, and sustained commitment to graduating leaders for academia, industry and government.

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The Computer Science Department was officially established in 1969, with Robert Stewart serving as the founding Department Chair. Faculty were composed of joint appointments with Mathematics, Statistics, and Electrical Engineering. In 1969, the building which now houses the Computer Science department, then simply called the Computer Science building, was completed. Later it was named Atanasoff Hall. Throughout the 1980s to present, the department expanded and developed its teaching and research agendas to cover many areas of computing.

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1969-present

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Multimedia streaming applications can signifincantly boost the value of mobile ad hoc networks (MANET). Live streaming, however, means continuous data delivery, which is a major challenge in MANET. Because of host mobility, a streaming path may be broken easily, causing streaming interruption. In this paper, we address this problem with a light-weighted yet robust streaming protocol. Our technique distinguishes itself from existing ones with two innovative features: proactive link protection (PLP) and receiveroriented adaptation (ROA). PLP allows a mobile host in a streaming path to find an alternative link before its current one becomes broken. This feature minimizes the chance of having to discover a new path in urgent to replace a broken link. While PLP protects the streaming continuity, ROA ensures the streaming efficiency by minimizing the hop number of a streaming path. Specifically, ROA dynamically adjusts the path of a live stream to make it as straight as possible along the direction from the source to the receiver. We evaluate the proposed technique through simulation, and our extensive performance study indicates that the new technique can support robust streaming applications with a minimal control overhead.

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